摘要:After a boyhood spentin a number of countries,Bill Yen enrolled as an undergraduate student at theUniversity of Redlands,a private liberal arts andsciences university located in southern California.He spent the years 1952~1956 there,graduatingwith the BS degree in Physics.
摘要:This note is a brief,informal account of Bill Yen's pioneering investigations of optical dephasing in inorganic glasses.The work,carried out at the University of Wisconsin by Bill,together with his graduate students,post-docs and colleagues,had great impact on the field and led directly to our current understanding of the various mechanisms for dephasing and how they are reflected in the temperature dependence of the homogeneous linewidth.
摘要:The first decade at the University of Georgia(UGA)was an active and exciting time for Bill Yen,his students,post-docs and collaborators.In this paper,I highlight several papers that I hope capture this activity and provide a glimpse into this creative and productive period.
摘要:William(familiarly known as Bill by all his colleagues)Yen's life-long scientific interest in the magnetic properties of rutile structured antiferromagnetic materials(AFMs)began with his involvement in the discovery in 1965 of the magnon sidebands of MnF2 in optical absorption[1].A basic outline of this discovery is given elsewhere in this special issue of the Chinese Journal of Luminescence[2].A narrative discussion of events leading to this discovery appears in a contribution written by Bill and Robert White for a special edition of Low Temperature Physics on Antiferromagnetism[3].A quote from that remembrance highlights a quality that remained with Bill throughout his career:"The identification of these sidebands by a pair of young students and two post-docs illustrates how serendipity,a touch of good luck and reckless youthful enthusiasm often plays a role in scientific discovery".Bill's forever youthful enthusiasm coupled with creative insights into current research questions led to numerous pioneering discoveries throughout his career.This paper reviews Bill's contributions to developing techniques to exploit dichroism to study the magnetic properties of AFMs.Bill's publications in this area span more than 30 years,from 1971 to 2004.
摘要:A wide range of luminescent materials havebeen studied by optical spectroscopy techniques.Prof.William M.Yen has made tremendous contri-bution to this research area.One of his interests inthe recent years was in delocalization processes thatstrongly affect the luminescence efficiency[1].
摘要:LaF3 is an ideal low-phonon host for rare earthions due to its ability to form extensive solid solu-tions with all the RE ions.In 1964,professor Yen published his first paper on the Physical Review titled"Phonon-induced relaxation in excited opticalstates of trivalent praseodymium in LaF3"[1],whichwas Prof.Yen s very first work in the field of solidstate optical spectrosc troscopy and is widely cited.
摘要:美国乔治亚大学(University of Georgia,UGA)物理系严懋勋(W. M. Yen)教授在他的后期工作中,主要从事长余辉荧光材料的基础研究和实际应用研究.在这些工作中,他起着组织、领导和支持的作用.因为他的倡导,长余辉荧光材料的研究在美国佐治亚大学取得很多成果.尤其是在长余辉的基础研究中,对长余辉基理的阐述,为长余辉材料的开发奠定了指导思想.作者在本文中将以记述的方式仅对其中一些主要成果加以介绍,并以此文表达对严懋勋教授的怀念.